Miller was born in Pittsburgh, Pennsylvania, and lived in Baltimore, Maryland. In August 1934, he moved to Moscow and worked as a correspondent for the Chattanooga News until 1937. In Moscow, Miller met and married his wife, Jenny Levy, an American. In 1937 Miller became press agent for the Spanish Republican government. In 1939 the Millers moved to New York City, and Miller became President of the Hemisphere News Service and editor of its weekly publication, Hemisphere. Jack Fahy was Vice President and Treasurer. Miller was known to be meeting with Jacob Golos as early as February of 1941 in New York. Sometime that same year the Millers moved to Washington D.C. so that he could take employment as an analyst for the Coordinator of Inter-American Affairs (CIAA) in the Department of Commerce at a good paying salary. He later became Director of the Division of Reports of the CIAA. About this time Miller began supplying information to Elizabeth Bentley for the Golos network. Miller had access to information supplied by the Office of Naval Intelligence (ONI), Army G-2 (Intelligence), the Office of Strategic Services (OSS), and the FBI concerning Latin American affairs. The material Miller supplied Bentley with for transmission to Soviet intelligence always concerned Communist or Russian activities in Latin America.

In September 1941, the Hemisphere News Service moved to Washington D.C. and became the Export Information Bureau, being managed by Joseph Gregg, and received a contract to do exclusive research work for the Coordinator of Inter-American Affairs. At the same time, Robert Miller became a research analyst with the CIAA. The Export Information Bureau was subsequently absorbed into the CIAA.

In December 1941, Miller was interviewed by D.M. Ladd of the FBI about a request to investigate several individuals and organizations for CIAA, including an organization called the "Society for Pan-American Confraternity". In February of 1942, at the request of Undersecretary James Forrestal, FBI Special Agent Jerry Doyle had lunch with John Nitze, a former employee of Forrestal. Nitze was accompanied by Miller, who was described as being in charge of intelligence for the CIAA. Nitze explained that Miller provided intelligence reports for both the Board of Economic Warfare (BEW) and the CIAA which were prepared from information supplied by the FBI, Office of Naval Intelligence and Army G-2.

After the war Miller worked directly under William Benton at a time when Benton was tasked with setting up loyalty procedures in the State Department. Miller resigned from the State Department in December 1946. According to Anatoly Gorsky's memo, "Failures in the U.S.A. (1938–1948)," December 1948: in Alexander Vassiliev's Notes from the KGB Archive. Miller's codename was "Mirage." "Mirage," is one of the codenames in in The Venona Papers that was not identified by other sources.

Source

Elizabeth Bentley, Out of Bondage: The Story of Elizabeth Bentley, Devin-Adair Company, 1951